Originally Posted by
bkay
My 1948 15-91 has a striated face. My 1947 201-2 has a decorative (art deco kind of) face. My 1952 201-2 has a striated face. So, I don't think there is a certain date that they changed to the striated face.
bkay
Like anything else involving a change to a part on Singer machines, dates are approximate and there's always gonna be exceptions like your 15-91. But as a general guide, around 1950 is when Singers were getting the striated face plate and by 1952 most had them. Funny thing is, it also applies to Japanese clones.
Cari